Cups to Grams Milk Converter
Convert milk from US or metric cups to grams and kilograms using stated ingredient reference weights and preparation conditions.
Convert cups of fluid dairy milk to an approximate mass in grams or kilograms. Select the milk type and the size of the measuring cup to keep the recipe’s volume convention explicit. The output separates mass from millilitres, which measure volume.
How to use this tool
- Choose the ingredient state that matches what you will actually measure.
- Select a US customary cup or a 250 mL metric cup.
- Enter the number of cups as a decimal, such as 0.75 for three quarters.
- Read the estimated mass and use the reference table to check other quantities.
Formula
grams = cups × reference grams per US cup × selected cup mL ÷ 236.5882365
The metric option assumes the same bulk density as the reference US cup. It is a proportional estimate, not a separate laboratory measurement. Zero cups gives zero mass.
Example
Two US cups of whole milk use 2 × 244 = 488 g, or 0.488 kg. The measured volume is 473.176473 mL. Selecting skim milk for the same two cups gives 490 g because its listed reference is 245 g per cup.
Reference and scope
The USDA 2002 household table lists 244 grams per cup for whole, two-percent and one-percent fluid milk without added milk solids. It lists 245 grams for skim milk. Those rounded portion weights are the reference here, not exact physical constants. The tool does not model changes in temperature, formulation or added solids.
Frequently asked questions
Is one millilitre of milk one gram?
Not in these reference values. Milk’s mass per measured volume differs from that of water, so the calculator uses milk-specific cup weights.
Can I measure milk powder this way?
No. Powdered, evaporated and sweetened condensed milk have different cup weights. Plant beverages and milk with added solids also fall outside these settings.
Why do three milk types give the same result?
USDA rounds their one-cup household weights to the same 244 g. Equal reference weights do not mean their composition or precise density is identical.
Sources
Last updated: 2026-10-30